java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.AssetFileDescriptor android.content.ContentResolver.openAssetFileDescriptor(android.net.Uri, java.lang.String)' on a null object reference

[ManuelRosa]

I am getting the following exception:

Fatal Exception: java.lang.RuntimeException: An error occurred while executing doInBackground()
       at android.os.AsyncTask$3.done(AsyncTask.java:354)
       at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
       at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
       at java.util.concurrent.FutureTask.run(FutureTask.java:271)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
       at java.lang.Thread.run(Thread.java:764)
Caused by java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.AssetFileDescriptor android.content.ContentResolver.openAssetFileDescriptor(android.net.Uri, java.lang.String)' on a null object reference
       at android.provider.ContactsContract$Contacts.openContactPhotoInputStream(ContactsContract.java:2142)
       at flutter.plugins.contactsservice.contactsservice.ContactsServicePlugin.loadContactPhotoHighRes(ContactsServicePlugin.java:647)
       at flutter.plugins.contactsservice.contactsservice.ContactsServicePlugin.access$700(ContactsServicePlugin.java:54)
       at flutter.plugins.contactsservice.contactsservice.ContactsServicePlugin$GetContactsTask.doInBackground(ContactsServicePlugin.java:434)
       at flutter.plugins.contactsservice.contactsservice.ContactsServicePlugin$GetContactsTask.doInBackground(ContactsServicePlugin.java:405)
       at android.os.AsyncTask$2.call(AsyncTask.java:333)
       at java.util.concurrent.FutureTask.run(FutureTask.java:266)
       at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
       at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
       at java.lang.Thread.run(Thread.java:764)

Following the stack tree it seems that the problem occurs in the frameworks/base/core/java/android/provider/ContactsContract.java when the content resolver is null

                try {
                    AssetFileDescriptor fd = cr.openAssetFileDescriptor(displayPhotoUri, "r");
                    if (fd != null) {
                        return fd.createInputStream();
                    }
                } catch (IOException e) {
                    // fallback to the thumbnail code
                }

Looking at the plug-in code there is one place on the onDetachedFromEngine method where this is set to null:

  @Override
  public void onDetachedFromEngine(FlutterPluginBinding binding) {
    methodChannel.setMethodCallHandler(null);
    methodChannel = null;
    contentResolver = null;
    this.delegate = null;
  }

I am getting crash reports for this problem but I cannot simply reproduced them in my app. My best guess is that it might be related with the running the getContacts call in the background and then closing the app.

Is this a known issue? Anyone else having the same problem?

Thanks for the support

[AkankshaKS]

Hi @ManuelRosa , were you able to solve this, I am also getting various crashes giving the same logs.

[ManuelRosa]

Hi @AkankshaKS . No, sadly I was not able to fix this problem yet and I am still getting this logs. Not sure if/when I will have the time to look at this personally.

[em-azhar]

Same problem here😭

[rubinbasha]

I am also running into the same issue on production. Is there any development on the matter?
Would at least a Null check help in this case and that would just fallback to "// fallback to the thumbnail code" just like the Catch clause does?

[rubinbasha]

Also just for learning reasons wanted to ask, is it possible to migrate to Kotlin as generally its safer? I speak as an Android Developer and my life has been changed to the better once I used Kotlin on my projects 😄

[rubinbasha]

any news on this issue, it is actually starting to affect multiple users in production for my app

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[TimYusR]

Having the same issue, version 0.6.3

Can't reproduce either

[DVendy]

Any updates on this?